Dyeing kettle and dyeing device for supercritical dyeing

Abstract

The invention discloses a dyeing kettle and dyeing device for supercritical dyeing. The dyeing device comprises a hollow dyeing kettle body, wherein the bottom of the dyeing kettle body is provided with an air inlet; the side wall of the dyeing kettle body is provided with an air outlet; the inner part of the dyeing kettle body is provided with a yarn dyeing column; a first through hole is arranged in the yarn dyeing column; the first through hole is communicated with the air inlet. The yarn dyeing column is composed of a plurality of sub yarn dyeing columns in series connection, and the material of the sub yarn dyeing column is a sintered metal porous filtering material. While ensuring that the supercritical carbon dioxide fluid with dye flows from the pores on the side wall of the yarn dyeing column to a cone yarn to dye the yarn, the oligomer and dye separated out from the supercritical carbon dioxide fluid after dyeing during the pressure reduction separation process can be filtered and prevented from sticking to the inner wall of the cone yarn, which causes contamination to the inner layer yarn, and results in uneven dyeing, so that the dyeing is uniform, and the mass production of supercritical carbon dioxide waterless dyeing of the cone yarn is facilitated.

Description

technical field [0001] The invention relates to the technical field of supercritical dyeing, in particular to a dyeing kettle and dyeing equipment for supercritical dyeing. Background technique [0002] In the traditional dyeing process, we usually use water as the main medium. A large number of chemical substances such as dyes and surfactants will have a negative impact on the sustainable development of the environment. In addition, neutralization, sedimentation and other treatments are required for the sewage discharged from dyeing, which requires a lot of manpower and material resources. According to incomplete statistics, the annual water consumption of my country's textile printing and dyeing industry reaches 1.7 billion tons, and the sewage discharge reaches 1.6 billion tons. However, in recent years, there has been a serious shortage of water resources in most parts of our country, especially problems such as sewage discharge have seriously restricted the further de...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned problems and deficiencies, the present invention provides a dyeing kettle and dyeing equipment for supercritical dyeing, which can avoid supercritical CO after dyeing. 2 The oligomers and dyes precipitated from the fluid during depressurization and separation stick to the inner wall of the bobbin and cause contamination to the inner layer of the yarn, resulting in uneven dyeing. The technical problem is to achieve uniform dyeing, suitable for supercritical polyester bobbin yarn in batches CO 2 Anhydrous dyeing

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